The primary instrument used in this study is the "Michigan InfraRed Combiner-eXeter" (MIRC-X), which is a six-telescope beam combiner instrument located at the CHARA array.
The CHARA array is a Y-shaped interferometric facility that comprises six \(1\,\) m telescopes. It is located at the Mount Wilson Observatory, California, and offers operational baselines between 34 and \(331\,\) m [1]}. The MIRC-X instrument [2]}, [3]}, [4]} is recording data routinely in H-band (\(\lambda =1.63\,\mathrm {\mu m}, \Delta \lambda =0.35\,\mathrm {\mu m}\)  with \(R=\lambda /\Delta \lambda =50\) ) since late 2017 [5]}.
